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  <section id="fortran-preprocess">
<span id="prop_tgt:Fortran_PREPROCESS"></span><h1>Fortran_PREPROCESS<a class="headerlink" href="#fortran-preprocess" title="Permalink to this heading">¶</a></h1>
<div class="versionadded">
<p><span class="versionmodified added">New in version 3.18.</span></p>
</div>
<p>Control whether the Fortran source file should be unconditionally
preprocessed.</p>
<p>If unset or empty, rely on the compiler to determine whether the file
should be preprocessed. If explicitly set to <code class="docutils literal notranslate"><span class="pre">OFF</span></code> then the file does not
need to be preprocessed. If explicitly set to <code class="docutils literal notranslate"><span class="pre">ON</span></code>, then the file does
need to be preprocessed as part of the compilation step.</p>
<p>When using the <span class="target" id="index-0-generator:Ninja"></span><a class="reference internal" href="../generator/Ninja.html#generator:Ninja" title="Ninja"><code class="xref cmake cmake-generator docutils literal notranslate"><span class="pre">Ninja</span></code></a> generator, all source files are
first preprocessed in order to generate module dependency
information. Setting this property to <code class="docutils literal notranslate"><span class="pre">OFF</span></code> will make <code class="docutils literal notranslate"><span class="pre">Ninja</span></code>
skip this step.</p>
<p>Use the source-specific <span class="target" id="index-0-prop_sf:Fortran_PREPROCESS"></span><a class="reference internal" href="../prop_sf/Fortran_PREPROCESS.html#prop_sf:Fortran_PREPROCESS" title="Fortran_PREPROCESS"><code class="xref cmake cmake-prop_sf docutils literal notranslate"><span class="pre">Fortran_PREPROCESS</span></code></a> property if a single
file needs to be preprocessed. If the variable
<span class="target" id="index-0-variable:CMAKE_Fortran_PREPROCESS"></span><a class="reference internal" href="../variable/CMAKE_Fortran_PREPROCESS.html#variable:CMAKE_Fortran_PREPROCESS" title="CMAKE_Fortran_PREPROCESS"><code class="xref cmake cmake-variable docutils literal notranslate"><span class="pre">CMAKE_Fortran_PREPROCESS</span></code></a> is set when a target is created its
value is used to initialize this property.</p>
<div class="admonition note">
<p class="admonition-title">Note</p>
<p>For some compilers, <code class="docutils literal notranslate"><span class="pre">NAG</span></code>, <code class="docutils literal notranslate"><span class="pre">PGI</span></code> and <code class="docutils literal notranslate"><span class="pre">Solaris</span> <span class="pre">Studio</span></code>,
setting this to <code class="docutils literal notranslate"><span class="pre">OFF</span></code> will have no effect.</p>
</div>
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